Chair arm



FIG. 1 is a perspective view of a chair arm, showing my new design, thebroken lines are for illustrative purposes only;

FIG. 2 is a front elevational view; the rear being a mirror imagethereof;

FIG. 3 is a left side elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a top plan view; and

FIG. 6 is a bottom plan view.

The ornamental design for a chair arm, as shown and described.